Car-truck



( Model.) 3 Sheets-Sheet 1.

- L. K, JEWETT.

GAR TRUCK.

No. 402,163. Patented Apr. 30, 1889.

(No Modem- 3 Sheets-Sheet 2. L. .K. JEWETT..

GAR TRUGK'. --No. 402,163. PatentedApr. so. 1889.

'WiT-na'sss: IDA/entai a 1.5:iasiiiiii II K r Patented Apr. 30, 1889.1711314,

GAR TRUCK.

L. K. JE-WETT.

u PETERS. rhowm m mr. wan-7, 10". Ii a (N9 Model.)

UNITED STATES PATENT OFFICE.

LUTHER K. JEWETT, OF BOSTON, MASSACHUSETTS.

CAR-TRUCK.

SPECIFICATION forming part of Letters Patent No. 402,163, dated April30, 1889.

Application filed' October 12, 1888. Serial No. 287,924. (No model.)

To all whom it may concern:

Be it known that I, LUTHER K. J EWETT, of Boston, county of Suffolk,State of Massachusetts, have invented an Improvement in Car- Trucks, ofwhich the following description, in connection with the accompanyingdrawings,

is a specification, like letters on the drawings representing likeparts;

This invention relates to car-trucks of that class in which a metallicbolster is fitted into and vertically movable in a metallic transom, andis an improvement upon the car-truck shown and described in anotherapplication,

Serial N 0. 251,705, filed by me October 7, 1887.

One feature of my present invention consists in constructing themetallic transom as will be described, whereby it is strengthened at.its upper part to enable it to withstand excessive strain and preventit being bent or doubled by shocks, such as would arise in suddenlystarting and stopping the car.

My improved transom also affords a support for the saddle-bar when.carried in toward the center of the truck, as when elliptical springsare used to supportthe bolster.

The transom is also constructed to permit of the passage of air throughit, thereby lessening resistance when the car is moving at a high rateof speed. The peculiar construction of the transom. permits water anddirt to pass'off freely.

Another feature of my invention consists in supporting the endcurve-plates upon the transom, so that when rounding curves the car ismaintained substantially level, as will be described.

Still another feature of my invention consists in making the bolster ofpreferably metallic tubes, by which increased strength, coupled withlightness and simplicity of construction, is obtained. 1

The tubes referred to are supported b bolster-sustaining blocks,preferably made in one piece or casting, but which may be made in twoparts suitably bolted or riveted together. The "bolster sustainingblocks are preferably provided with chafe-irons, to obviate wear uponthe bolster.

My invention further consists in making the upper or'top side of thearch-bar-sustaining blocks concaved downward, and forming or shaping thearch-bar to conform to it, for a purpose as will be described.

Still another feature of my invention consists in a novel pedestalstrap,to be hereinafterdescribed.

The particular features in which my invention consists will be pointedout in the claims at the end of this specification.

Figure 1 is a side elevation of a car-truck embodying my invention; Fig.2, a partial end elevation and transverse section of the cartruck shownin Fig. 1, the section being taken on line 00 00; Fig. 3, a top or planview of the truck shown in Fig. 1. Fig. at is a side elevation andlongitudinal section of the transom, showing part of onearch-bar-sustaining block in section, the section being taken 011 lineif 3 Fig, 1; Fig. 5, a top or plan view of the transom partially brokenout; Fig. 6, a section of the transom in the line x Fig. 4; Fig. 7, apartial longitudinal section and elevation of a bolster and itssustaining-blocks; Fig. 8, a partial top view of the bolster and itssustaining-blocks shown in Fig. 7; Fig. 9, a section in line a of thebolster and its sustaining-blocks shown in Fig. 8; Fig. 10, a sectionthrough the center of the bolster in the line 00 Fig. 8; Figs. 11 and12, details to be referred to, Fig. 12 being a top or plan view of Fig.11; Fig. 13, a top or plan view of the saddle; Fig. 14, a section inline a of the saddle shown in Fig. 13; Fig. 15, a detail of the rocker;Fig. 16, a top view of the end curve-plate; Fig. 17, an end elevation ofthe curve-plate shown in Fig.16, and Fig. 18 .a side elevation of theend curve-plate.

Referring to Figs. 1 and 6, the transom is composed, as shown, of twoside pieces, 00,001- ner pieces, co, and bottom pieces, a preferably ofsteel, which are riveted, as herein shown, to inside castings or braces,a The soln is open between the side pieces and corner pieces, so thatair is permitted to pass readily through the transom when the truck isin motion, and the said transom being open at its bottom between thepiece a and corner pieces permits water and dirt to pass through thetransom. The side pieces, a, are made of suitable thickness to stiffenthe upper part of the transom and enable it to with stand shocks such asdue to suddenly starting and stopping the ear with which the truck isused.

The transom at its ends supports, as shown, a frame, I), sustaining endcurve-plates, (not herein shown,) but which will preferably besubstantially such as shown and described in the application referredto, the curve-platesupporting frame serving as a stop to limit the sideswaying or tipping of the car when rounding a curve, or when the car isrunning on irregular tracks, thereby maintaining a substantiallyhorizontal position and effecting a more even riding of the ear.

The transom receives within it the bolster composed,preferably, of twoor more metallic tubes, 1), the said tubes, as herein shown, beingsupported by sustaining-blocks If, each of which is preferably east inone piece, but which may be preferably made in two parts securedtogether, as by rivets or bolts. The bolster-sustaining blocks 1) areprovided, as herein shown, with chafe-irons 19 which cooperate with theupper portion of the castings or transom-braces a", which are preferablywidened, as at b (See Fig. at.)

Instead of providing the bolster-sustaining blocks 1) with chafe-irons,the bolster-tubes may have chafe-irons b riveted or otherwise secured tothem, as shown in Figs. 11 and 12.

The tubular bolster is supported within the transom, as herein shown, byelliptical springs b resting on a spring-seat, which is itself rockedupon the hanger-seat 12 (see Fig. 2,) the said hanger-seat beingsustained at each end by a hanger-link, b, passed over the rocker-bar bsubstantially as in the application referred to. The rocker-bar b ismounted upon a saddle, 0, (see Figs. 13 and 14,) and the said saddle issupported directly upon the side pieces, a, of the transom, and theupper arch-bar, c, and its sustaining-blocks (1 the saddle-bar beingsecured by suitable bolts 0 which are extended through the saddle-bar,arch-bar-sustainin g blocks, and pedestal-strap c, as shown in Fig. 1,to securely unite or tie the said parts together. Each arch-barsustaining block w is cast with its upper or top side, 2, (see Fig. 1,)concaved downward, and the upper arch-bar, c, is bent or shaped toconform to the shape of the casting. This construction prevents theupward buckling of the upper arch-bar when the truck is abnormallyloaded,because the said arch-bar to buckle would have to elongate, andit is prevented from so doing by the truss 0 which supports the transomand encircles the ends of the upper arch-bar. To permit the upperarch-bar to buckle the truss 0 would have to be elongated, which issubstantially impossible. The pedestal-strap 0, connecting the pedestalsand transom for sake of stiffness or rigidity, is composed of a singlebar corrugated, preferably, on both sides, as shown in Fig. 2.

My improved truck will preferably be provided with the equalizer-bar (land equalizersprings cl, substantially as shown in the applicationreferred to.

I claim- 1. In a ear-truck, the combination, with a metallic transomcomposed of independent pieces of castings or braces to unite the saidpieces to form the transom, of sustainingblocks provided with shouldersto co-operate with the said pieces, substantially as described.

2. In a car-truck, a metallic transom composed of independent side andcorner pieces, combined with sustaining-blocks provided with shouldersto co-operate with the said pieces, and with braces or castings to unitethe said pieces to form the transom, substantially as described.

3. In a car-truck, the combination, with a metallic transom, of acurve-plate-sustaining frame secured at or near the ends of the saidtransom, substantially as described.

4. In a ear-truck, the combination, with a transom, of a bolstervertically movable therein and composed of independent tubes, andsustaining-blocks for said tubes, substantially as described.

5. In a car-truck, the combination, with a transom composed ofindependent pieces, of a bolster vertically movable therein and composedof tubes, and sustaining-blocks for said tubes, substantially asdescribed.

6. In a ear-truck, the combination, with a transom composed ofindependent pieces, and castings or braces to unite said piecestogether, of a bolster composed of independent tubes and verticallymovable in said transom, sustaining-blocks for said tubes, andchafe-irons to prevent wear of the bolstertubes, substantially asdescribed.

7. In a car-truck, the combination, with a transom composed ofindependentpieces, and castings or braces to unite said pieces together,of a bolster composed of tubes and vertically movable in said transom,sustaining-blocks for said tubes, and chafe-irons secured to saidbolster-sustaining blocks, substantially as described.

8. In a car-truck, the combination, with a transom, ofarch-bar-sustaining blocks having their upper or top sides concaveddownward, and arch-bars shaped or bent to fit said concaved sides, asand for the purpose specified.

9. In a car-truck, the pedestal-strap composed of a single 'col rugatedbar, s'ubstzm- Intestimonywhereoflhavesignedmyname tially as described;to this specification in the presence of two 10. In a Cal -truck; thecol'nbination, with subscribing Witnesses. an arch-bai sustainingb100k,- of a metallic LUTHER K. JEXVETT. 5 transom having its upper endresting upon Witnesses:

and supported by the top f the said sustain- J AS. H. CHURCHILL,ing-block substantially as described. A. S. VVIEGAND.

